A system for reprofiling a wheel set of a railway vehicle allows the center of rotation of the wheel set to move relative to supporting rollers. A cutting tool used to reprofile the wheel profile on a wheel set is moved relative to the center of rotation of the wheel set to maintain a constant distance between the center of rotation and the cutter. The rollers are maintained in a fixed position during the cutting process. The system avoids mechanically forcing a constant location of the wheel set relative to the center of rotation.

A system for reprofiling a wheel set of a railway vehicle allows the center of rotation of the wheel set to move relative to supporting rollers. A cutting tool used to reprofile the wheel profile on a wheel set is moved relative to the center of rotation of the wheel set to maintain a constant distance between the center of rotation and the cutter. The rollers are maintained in a fixed position during the cutting process. The system avoids mechanically forcing a constant location of the wheel set relative to the center of rotation.

A second distance is longer than a first distance and a value obtained by dividing the third distance by the fourth distance is more than or equal to 0.5 and less than or equal to 0.8 when it is assumed that the first distance represents a distance between the cutting edge and the mounting surface in a direction perpendicular to the rake face, the second distance represents a distance between the mounting surface and a boundary portion between the rising portion and the flat portion in the direction perpendicular to the rake face, the third distance represents a distance between the boundary portion and a tip of the cutting edge in a direction parallel to the rake face, and the fourth distance represents a distance between the second discharging opening portion and the tip of the cutting edge in the direction parallel to the rake face.

Tool for machining a workpiece, comprising: a holder having a first internal coolant duct; a cutting insert having a main cutting edge; a first fastening element for releasably fastening the cutting insert to the holder; a plate-like coolant guiding attachment having a second internal coolant duct; and a second fastening element for releasably fastening the coolant guiding attachment to the holder. In the assembled state of the tool, the first internal coolant duct is fluidically connected to the second internal coolant duct and the coolant guiding attachment covers at least a part of the cutting insert. The coolant guiding attachment comprises a first opening, which is configured as a recess or through-opening and allows access to the first fastening element, such that the cutting insert is separately releasable from the holder by releasing the first fastening element even when the coolant guiding attachment is fastened to the holder, and the coolant guiding attachment is separately releasable from the holder by releasing the second fastening element even when the cutting insert is fastened to the holder.

Represented and described is an underfloor wheel set processing machine, in particular an underfloor wheel lathe (1) for reprofiling wheels and brake discs of wheel sets (20) of rail vehicles, comprising: a machine stand (3), a crossbeam (2) for bridging a workshop track (4) with at least two rails (4A, 4B, 4C) in the transverse direction, two roller carriers (7A, 7B), at least four friction rollers (8), at least one friction roller drive (9) to drive the friction rollers (8) and at least one axial guide roller (19) to axially guide the wheel set (20), wherein the machine stand (3) has a first part (3A) and a second part (3B), wherein the crossbeam (2) is supported on both parts (3A, 3B) of the machine stand (3), wherein the roller carriers (7A, 7B) are movably connected to the machine stand (3), and wherein the friction rollers (8) are rotatably supported on the roller carrier (7A, 7B). In order to adjust to wheel sets (20) with different track widths, it is proposed for the first part (3A) of the machine stand (3) and the second part (3B) of the machine stand (3) to be displaceable relative to one another in the transverse direction.

A manufacturing method for a vehicle wheel includes an overlap cutting step in which lathe machining is performed on a design portion of the vehicle wheel at feed speed that allows cutting marks to be connected with each other in a radial direction with a first cutting depth from a given reference position, and a non-overlap cutting step in which, after the overlap cutting step, lathe machining is performed on the design portion at feed speed that allows cutting marks to be separated from each other in the radial direction with a second cutting depth from the reference position, the second cutting depth being deeper than the first cutting depth.

A manufacturing method for a vehicle wheel includes an overlap cutting step in which lathe machining is performed on a design portion of the vehicle wheel at feed speed that allows cutting marks to be connected with each other in a radial direction with a first cutting depth from a given reference position, and a non-overlap cutting step in which, after the overlap cutting step, lathe machining is performed on the design portion at feed speed that allows cutting marks to be separated from each other in the radial direction with a second cutting depth from the reference position, the second cutting depth being deeper than the first cutting depth.

A tool-transition-free machining method includes: first, a primary turning is conducted, then holes are drilled out by a machining center, and finally a secondary turning is conducted.

The present application provides a device for correcting an aluminum alloy wheel, which is mainly composed of a frame, an expansion cylinder, a correction motor, a feed motor and the like. A hub positioning unit initially positions a hub to prepare for positioning a center hole expansion sleeve; a hub feed unit performs precise center hole positioning on the hub and completes upward feed movement of the hub; and a tool correction unit completes hub correction through a rotating standard correction cutter head. The device may meet the process requirements of wheels in flow production, improve the runout and balance qualified rate of products, and solve the problems of decentraction of the outer diameter in the first procedure and the second procedure and deformation of rim bulges.

The present application provides a device for correcting an aluminum alloy wheel, which is mainly composed of a frame, an expansion cylinder, a correction motor, a feed motor and the like. A hub positioning unit initially positions a hub to prepare for positioning a center hole expansion sleeve; a hub feed unit performs precise center hole positioning on the hub and completes upward feed movement of the hub; and a tool correction unit completes hub correction through a rotating standard correction cutter head. The device may meet the process requirements of wheels in flow production, improve the runout and balance qualified rate of products, and solve the problems of decentraction of the outer diameter in the first procedure and the second procedure and deformation of rim bulges.